Christie Roadie HD+35K User Manual page 128

Section 3: Operation
How Long Can I Maintain Brightness?
Software can maintain your "Intensity" setting until the required power exceeds the maximum rating for the
lamp (2.0, 3.0, 4.5, or 6.0 kW) by approximately 10%. The lower the setting, the longer it takes to reach this
threshold, and the longer you can maintain the desired brightness. Keep in mind that once the lamp power
reaches its maximum wattage (see "Power", above), this tracking is no longer possible. At this point, the lamp
gradually dims as usual, even though your original "Intensity" value still appears in the menu. To resume
accurate tracking, reduce the intensity setting so that the resulting "Power" value is less than its maximum-the
lower the intensity, the longer it can be maintained.
For example, a 6000-watt lamp (6.0 kW) can be safely driven at no more than 6600 watts. To produce desired
brightness at the screen, a new lamp would likely need less than this maximum rating-perhaps 5120 watts
(example only). Over time, however, the lamp requires more and more current in order to generate the desired
light, until eventually the lamp wattage reaches its 6600 "overdrive" maximum, and the lamp power
automatically levels off. At this point, the tracking function terminates (i.e., the power level stabilizes) and the
lamp begins to dim normally. Either reduce your "Intensity" setting or replace the lamp.
Do not lower the "Intensity" so much that the corresponding "Power" value reaches its minimum and the
intensity setting is inaccurate, and cannot be maintained. For best results in achieving uniform intensity
amongst tiled images, choose an "Intensity" setting that enables all lamps to operate at less than the maximum
number of watts available in your projector , but high enough to keep the corresponding lamp power above its
minimum. See "Power", above.
NOTES: 1)
Lamps become more stable over time, thus a specific intensity is more easily maintained as the lamp
2)
ages.
Max Brightness mode.
The Lamp History option (read-only) lists the number for those lamps most recently
installed and recorded in the projector. The Lamp History automatically updates
whenever you record a new lamp serial number and the new lamp is added to the bottom
of the list.
Use Change Lamp to record the serial number for a newly installed lamp:
In the Lamp S/N window, use the number text entry keys to record the new lamp serial number, and press
E
NTER again to accept the change. Refer to
need help entering the number. Once entered, the new lamp serial number is added to the
and the Lamp Hours timer resets to "0". Lamp Mode and Lamp Limit remain as they were for the previous
lamp, and can be changed at any time.
3-62
Intensity can be set only if the lamp is in "Intensity" mode 3) Intensity cannot exceed the output of
Figure 3-36 Recording the New Lamp Serial Number
3.5.5 Using Slidebars and Other Controls, on page 3-18 if you
Lamp History
menu
Roadie HD+35K User Manual
020-100340-02 Rev. 1 (01-2010)